The Grenade launcher was a grenade-firing weapon that appears in The Drowned Vault. It fired football shaped smoke, fire, and lighting grenades. It was used in the attack on Phoenix's cigar factory. Robert Boone was the only known owner of such a weapon. The Grenade launcher was most notably used by John Smith.

Animals Golden PatrikJaculus VipersJet SquidPatriciaPatrik
Objects Solomon KeysThe Dragon's Tooth (artifact)
Order of Brendan 1914 Order of Brendan Guidelines for AcolytesThe Order of Brenden
Places Archer MotelAshtownPolygonThe BurialsZoo
Plants Quickwater
Weapons Grenade launcher